Bottle with grooves on an inner side and injection molding method for making the bottle

Abstract

A bottle includes a main body, and a lateral part; the main body is made by means of injection molding, and it has an opening, a containing room communicating with the opening, a gap on a first lateral portion thereof, and grooves on an inner side of a second lateral portion, which faces the first lateral portion; the second part is also made by means of injection molding, and it has grooves thereon; the lateral part is closely fitted in the gap and secured to the main body with the grooves thereon facing the grooves of the main body.

1 . A bottle made by means of injection molding and having grooves on an inner side, comprising 
 a main body made by means of injection molding; the main body having a containing room, and a gap on a first lateral portion thereof; the main body having a plurality of grooves on an inner side of a second lateral portion thereof; and    a second part made by means of injection molding; the second part being closely fitted in the gap and secured to the main body.    
   
   
       2 . The bottle as claimed in  claim 1 , wherein the second part has a plurality of grooves on an inner side thereof.  
   
   
       3 . The bottle as claimed in  claim 1 , wherein the main body has a locating portion around the gap thereof, and the lateral part has a locating protrusion on an edge thereof, which is pressed against the locating portion of the main body.  
   
   
       4 . A method for making a bottle having grooves on an inner side with injection molding, comprising 
 (1) a first step: preparing a mold, which includes a main mold part, and a second mold part; the main mold part having a hole on a lateral side; the second mold part having a plurality of raised lines on one end thereof;    (2) a second step: passing the second mold part through the hole of the main mold part such that the raised lines of the second mold part is apart from and faces an inner side of the main mold part;    (3) a third step: injecting materials into the mold such that the material is molded into a main body of a bottle, which has a gap corresponding to the second mold part, and grooves corresponding to the raised lines of the second mold part;    (4) separating the second mold part from the main mold part, and taking the main body of the bottle from the main mold part;    (5) a fifth step: making a lateral part of the bottle by means of injection molding; and    (6) a sixth step: fitting the lateral part in the gap closely and securing the lateral part to the main body.